SPIRO
EXCEPTIONAL GUARANTEE
14.3
78_0
4
DOMESTIC | COMMERCIAL | INDUSTRY
DEAERATORS FOR HEATING,
COOLING AND PROCESS
SYSTEMS
SPIROVENT®
2
products which start to roam around the
system in the form of particles. Eventually,
this will cause damage to expensive system
components and lead to system and process
malfunctions or even total failure, things
which can be avoided if tackled individually
but which need to be followed up and lead
to unnecessary costs.
Micro bubbles are impossible to remove
with just traditional AAV’s. Deaeration
equipment is the only effective way to
separate them out of the system.
After initial venting, a fluid system such as a
heating, cooling or process system will still
contain a lot of micro bubbles and dissolved
gases. And what is more, air will continue to
get in while work is being carried out on the
system and through (micro) leaks. If gases
are not removed, or are not removed
sufficiently, this will lead to commissioning
problems, frequent manual venting,
deteriorating pump performance,
unnecessary energy consumption and so on.
The presence and continuous occurrence of
air will also lead to the creation of corrosion
600
500
400
300
200
100
0000.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45
Diameter [mm]
Num
ber
of b
ubbl
es p
er li
tre
“The presence of air also causes dirt-related problems.”
This graph shows the number of air bubbles in water as it leaves the boiler and the size of these bubbles.
Air: a disruptive factor in fluid systems
Air in a system is often the cause of unnecessary complaints, excessive wear and avoidable disruption to processes. Familiar symptoms include reduced efficiency and unnecessary system failure. Total solutions
Spirotech offers an extensive range of
total solutions for HVAC and process
systems: accessories, additives and
advice to ensure optimum efficiency
and guarantee the quality of the system
fluid. These products and services
reduce faults, wear and maintenance as
well as improve system performance
and lower energy consumption. And
what is more, these total solutions
provide major benefits and save time
during the design, installation, start-up
and commissioning of systems.
3
SPIRO
EXCEPTIONAL GUARANTEE
10.886
_00
WONINGBOUW | UTILITEIT | INDUSTRIE
VACUÜMONTGASSER VOOR
VERWARMINGS-, KOEL- EN
PROCESINSTALLATIES
SPIROVENT® Superior
William Henry
How can air get into a system? There are a number of ways in which air can get into a system. The main ones are listed
below:
• (re)filling of the system, alterations and maintenance;
• micro leaks and diffusion through glands, gaskets and plastic pipes;
• open expansion systems and cooling towers;
• incorrect expansion volume, incorrect or poor maintenance of pre-set air charge of vessels;
• capacity of water to absorb gases following physical laws, especially Henry’s Law.*
Removing gases from a system There are two ways to release gases from
fluids and remove them from a system.
Thermal degassing: by means of
temperature differences
By increasing the temperature in a system,
dissolved gases will release themselves. A
SpiroVent micro bubble deaerator can then
remove these separated gases from the
fluid.
Vacuum degassing: by means of forced
underpressure
With vacuum degassing, part of the system
fluid is temporarily put in an underpressure
(vacuum) condition. The gases dissolved in
the fluid are released, separated and
removed from the system. By reintroducing
the degassed fluid into the system it can
absorb further free air pockets from the
circuit.
When should a vacuum degasser be used? 1. For systems with many branches and a
low flow velocity. In such systems, the
free accumulated air is often not
circulated with the volume flow but will
disappear by itself following the
installation of a vacuum degasser thanks
to the fluid being made absorptive.
2. When there are slight differences in
temperature. In these situations,
dissolved gases will be released
insufficiently. A vacuum degasser is not
dependent on the fluid temperature.
3. When an inline degasser cannot be
mounted on the system due to practical
reasons. A vacuum degasser can be
connected to virtually any point within a
system.
4. When the static height above the hottest
point exceeds the critical height.
* Henry’s Law: “Gas will dissolve in a liquid until there is a balance
between the partial pressure of the gas and the pressure in the
liquid”. That means that as the temperature rises or the pressure
drops, the mass of gases that dissolves in a liquid will be reduced.
Therefore at certain points within a system, the amount of gas
absorbed or dissolved gas emitted will depend on the pressure and
temperature.
Static height and temperatureIn case of an excessive static head (pressure) above a deaerator, dissolved air cannot be
released from the fluid. In these circumstances it is very hard to predict where in the system
air bubbles will emerge from the fluid. Apart from that, the point where micro bubbles
emerge can change depending fluid temperature and hydrostatic pressure (Henry’s Law).
Rule of thumb for maximal static height: heating ≤ 15 m, cooling ≤ 5 m. Above the critical
height, a vacuum degasser generally is a more effective solution. For custom made advice
please contact us.
SpiroVent micro bubble deaerators
A separate brochure is
available on SpiroVent
Superior vacuum degassers.SpiroVent Superior vacuum degassers
Cri�cal height
00 10 20 30 40 50 60 70 80 90 100
5
10
15
20
Max. opera�ng temperature [°C]
Deaerators
Hea�ng
Cooling
Vacuum degassers
Sta�
c he
ight
abo
ve d
eaer
ator
[m]
4
1
5
6
7
8
2
3
4
SPIRO
EXCEPTIONAL GUARANTEE
Benefits SpiroVent• Removes circulating air and micro bubbles
effectively.
• Removes trapped air.
• Greatly reduces commissioning times and
manual venting is much less time
consuming.
• Minimal, constant pressure drop.
• No unnecessary shutdown.
• Connection diameters from ¾” to DN 600
and above.
• A complete range, suitable
for various pressures and
temperatures.
• Exceptional guarantee.
1. Lifting eyes make installation of bigger
units very easy.
2. Solid construction guarantees a very long
life.
3. The unique Spirotube is the heart. This
component has been specially designed
for optimum separation of air and micro
bubbles and yet offers very low flow
resistance.
4. Drain plug on steel units. Also suitable for
connecting a drain valve, temperature
sensor or pressure sensor.
5. The automatic air vent will not leak and
cannot be closed. Many models come
with thread for connecting a vent pipe as
standard.
6. Specially constructed air chamber
prevents floating dirt from reaching the
valve and provides sufficient volume to
absorb pressure fluctuations.
7. Drain valve on steel units for admitting or
releasing large amounts of air (when
filling or emptying the system) and for
removing floating dirt.
8. Many different connection options. Brass
with compression fittings or female
thread, horizontal and vertical. Steel with
weld ends or flanges.
Because the SpiroVent removes the
countless micro bubbles effectively, the
system fluid becomes absorptive. That
means that the fluid can then be returned to
the system and can absorb gases and
discharge them into the SpiroVent again.
Air-related problems become a thing of the
past. The main test and measurement
set-up used by Spirotech to develop
deaerators is TÜV-approved.
At the heart of the SpiroVent is a spiral structure through which the fluid flows. This is the “Spirotube”, which ensures that micro bubbles rise automatically. Although the Spirotube can trap the smallest micro bubbles, it has a very open structure which results in a very low pressure drop.
SpiroVent deaerators: time-saving and effective
SpiroPlus
Protect and optimize the system and its
efficiency with SpiroPlus flushing
agents and additives.
5
SpiroVent deaerators are suitable for water and water/glycol mixtures (max. 50%). They can
be used in combination with locally approved chemical additives and inhibitors that are
compatible with the materials applied within the system. Not suitable for drinking water
installations.
The standard SpiroVent is suitable for a temperature range of 0 to 110 ºC and for an operating
pressure of 0 to 10 bar. From DN 050, the SpiroVent housing is made of unalloyed steel. The
flange connection is PN 16. The housing of the SpiroVent 22 mm compression, ¾”, 1”, 1¼ ”,
1½” and 2” is made of brass. Other sizes, materials, pressures and temperatures are available
on request.
Flow resistance graph for SpiroVent
Measured values according to Spirotech standard. Values shown are maximum values. Please contact us for further information.
Add-on sets
Spirotech provides complete add-on sets for
vertical oil and gas boilers with distributors
and mixing groups which are ready for use.
These can be installed between the boiler
and the mixing group.
Solar applications
Spirotech also offers an extensive range of
automatic air vents and deaerators for solar
applications.
10
1
0,10,1 1 10
Pres
sure
dro
p [k
Pa]
Flow [l/s]
22m
m &
G¾
22m
m V
& G
¾ V
G1 G1 ¼
G1V
G1 ½
G2
100
10
1
0,11 10 100 1000
Pres
sure
dro
p [k
Pa]
Flow [l/s]
Brass Steel
DN50
DN65
DN80 DN
100
DN12
5
DN15
0
DN20
0
DN25
0DN
300
DN35
0DN
400
DN45
0DN
500
DN60
0
10
1
0,10,1 1 10
Pres
sure
dro
p [k
Pa]
Flow [l/s]
22m
m &
G¾
22m
m V
& G
¾ V
G1 G1 ¼
G1V
G1 ½
G2
100
10
1
0,11 10 100 1000
Pres
sure
dro
p [k
Pa]
Flow [l/s]
Brass Steel
DN50
DN65
DN80 DN
100
DN12
5
DN15
0
DN20
0
DN25
0DN
300
DN35
0DN
400
DN45
0DN
500
DN60
0
Insulation
Specially made insulation
sets are available for most
deaerators.
Custom-made solutions and OEM
applications
Spirotech offers not only standard products.
If necessary, we work with customers to
produce custom-made solutions. These are
based on users’ specific requirements. If
desired, these can also be supplied as OEM
products.
Digital support
Product data sheets, standard specification
texts, line drawings, CAD symbols, project
descriptions, etc. are available via our web-
site.
6
Spirotech offers an extensive range of
SpiroVent deaerators specially for removing
air. All products can be used for both new
build projects and for renovating heating,
cooling and process systems. SpiroVent
deaerators are available in brass and in
(stainless) steel. The brass separators,
suitable for a flow velocity of up to 1 m/s,
can be installed in horizontal and vertical
pipes. The steel models are available in
standard and hi-flow designs.
H [m
m]
L [mm
]
Max. flow
[m3/h]
Max. flow
[l/s]
∆p at max. flow
[kPa]
Article num
ber
22 mm. comp. 153 106 1,3 0,35 1,3 AA022
22 mm. comp. V 220 104 1,3 0,35 1,5 AA022V
G ¾ 153 85 1,3 0,35 1,3 AA075
G ¾V 210 84 1,3 0,35 1,5 AA075V
G1 180 88 2,0 0,55 1,3 AA100
G1V 210 84 2,0 0,55 2,4 AA100V
G1¼ 200 88 3,6 1,0 1,3 AA125
G1½ 234 88 5,0 1,4 1,3 AA150
G2 275 132 7,5 2,1 1,4 AA200
ConnectionBrass, horizontal: 22 mm up to 2”
Brass, vertical: 22 mm up to 1” V= Vertical connection Flow velocity ≤ 1 m/s
Operating pressure: 0 - 10 bar Fluid temperature 0 - 110 °C
Other sizes, materials, pressures and temperatures are available on request
An extensive range of SpiroVent deaerators
Optimum system and process water quality is achieved when air and dirt is kept to a minimum. If air and dirt is not removed, or is not removed sufficiently, numerous complaints and problems can arise such as annoying noises, frequent manual venting, deteriorating pump performance, an imbalance in the system, unnecessary disturbance and excessive wear. All these things result in higher energy consumption, complaints and failure and often require immediate action.
7
h1h1
Select the correct SpiroVent: 1. Determine the pipe diameter.
2. Determine the flow.
3. Determine the correct model using the table.
Choosing a larger connection size allows achieving the same flow rate with a lower flow
velocity, resulting in better separation efficiency and a lower pressure drop (less energy loss).
A SpiroVent deaerator must always be installed at the hottest point within a system. In the
case of a heating system, for example, this is the point where the water exits the boiler. In the
case of a cooling system, it is in the return before the chiller unit.
Standard vs. Hi-flowStandard steel SpiroVent products are designed for a nominal flow velocity up to 1.5 m/s.
At higher velocities the increased turbulence will not always leave sufficient separation zone
in a standard unit for optimal separation. Exceeding the nominal flow will also lead to a sub-
stantially increased pressure drop. For structural higher flow velocities (up to 3 m/s) a Hi-flow
type is recommended.
Standard: DN50 to DN600
Hi-flow: DN50 to DN600
Connection [DN
]
Connection OD
[mm
]
L [mm
]
LF [mm
]
H [m
m]
Article num
ber*
H [m
m]
Max. flow
[l/s]
Max. flow
[m3 /h]
p at max. flow
[kPa]
Article num
ber*
Max. flow
[l/s]
Max. flow
[m3 /h]
p at max. flow
[kPa]
Max. flow
[l/s]
Max. flow
[m3 /h]
p at max. flow
[kPa]
050 60 260 350 470 3,5 12,5 3,0 7 25 11,8 BA050 630 7 25 11,8 HA050
065 76 260 350 470 5,5 20 2,7 11 40 11,6 BA065 630 11 40 11,6 HA065
080 89 370 470 590 7,5 27 2,9 15 54 12,4 BA080 785 15 54 12,4 HA080
100 114 370 475 590 13 47 3,7 26 94 14,6 BA100 785 26 94 14,6 HA100
125 140 525 635 765 20 72 4,2 40 144 16,8 BA125 1045 40 144 16,8 HA125
150 168 525 635 765 30 108 4,9 60 215 19,4 BA150 1045 60 215 19,4 HA150
200 219 650 775 975 50 180 5,8 100 360 23,1 BA200 1315 100 360 23,1 HA200
250 273 750 890 1215 80 288 6,9 160 575 27,7 BA250 1715 160 575 27,7 HA250
300 324 850 1005 1430 113 405 7,7 225 810 31,0 BA300 2025 225 810 31,0 HA300
350 356 n/a 1128 1910 140 500 7,8 280 1000 31,0 BA350 2400 280 1000 31,0 HA350
400 406 n/a 1226 2120 180 650 8,4 360 1300 34,0 BA400 2680 360 1300 34,0 HA400
450 457 n/a 1330 2320 235 850 10,0 470 1700 39,0 BA450 2960 470 1700 39,0 HA450
500 508 n/a 1430 2540 295 1060 11,0 590 2120 43,0 BA500 3250 590 2120 43,0 HA500
600 610 n/a 1630 2980 425 1530 12,0 835 3000 47,0 BA600 3830 835 3000 47,0 HA600
Operating pressure: 0 - 10 bar Fluid temperature 0 - 110 °C Other sizes, materials, pressures and temperatures are available on request.
* for weld ends add L (e.g. HA200L) for flanges add F (e.g. HA200F)
Standard; nom. 1.5 m/s
nom. = 1,5 m/s max. = 3 m/s
Hi-flow; nom. 3 m/s
Max. flow m3/h and l/s Applicable SpiroVent
m3/h
12,5
20 25 27 40 47 54 72 94
108
144
180
215
288
360
405
500
575
650
810
850
1000
1060
1300
1530
1700
2120
3000 Standard
Hi-flow
3,5
5,5 7 7,5
11 13 15 20 26 30 40 50 60 80
100
113
140
160
180
225
235
280
295
360
425
470
590
835
DN050 BA050 HA050
DN065 BA065 HA065
DN080 BA080 HA080
DN100 BA100 HA100
DN125 BA125 HA125
DN150 BA150 HA150
DN200 BA200 HA200
DN250 BA250 HA250
DN300 BA300 HA300
DN350 BA350 HA350
DN400 BA400 HA400
DN450 BA450 HA450
DN500 BA500 HA500
DN600 BA600 HA600
l/s∅
Other sizes, materials, pressures and temperatures are available on request.
= standard model at nominal flow = standard model at maximum flow, hi-flow recommended = choose bigger Ø or lower the flow
Hi-flow
Standard
SPIRO
EXCEPTIONAL GUARANTEE
The diagrams and situations presented in this brochure are only intended to serve as examples. We would be pleased to advise you on any specific circumstances. Modifications and printing/typographic errors reserved. ©Copyright Spirotech bv. No part of this publication may be used without prior written permission from Spirotech bv.
SPIROLIFEGuarantee of a lifetimeSpirotech’s Exceptional Guarantee Terms!
Conditions: Correct selection, installation, maintenance and use of the products, in accordance with our regulations, data sheets and user manuals. Our guarantee does not cover normal wear and tear. Please also see our general terms and conditions.
Brass Products ≤ 110°C:20 years
Steel Products andBrass Products >110°C:5 years
Vacuum Degassers:2 years
14.3
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Spirotech designs and produces innovative total solutions for conditioning fluids in HVAC and
process systems. Our products and services reduce faults and wear, less maintenance is
required, performance is improved and energy consumption is reduced.
Spirotech is deservedly regarded as the only real specialist in the world. Leading manufactu-
rers of system components recommend Spirotech products on account of their high standard
of quality and the company’s vision on product development and process improvement.
Thanks to a very extensive international network of suppliers, users all over the world enjoy
the benefits of our products and services every day.
Spirotech is a Spiro Enterprises company
Spirotech: accessories, additives and advice
Spirotech bvPO Box 207 5700 AE Helmond, NLT +31 (0)492 578 989F +31 (0)492 541 [email protected]
Spirotech UK Ltd.PO Box 818 AltrinchamCheshire, WA15 5GZT +44 (0)208 451 3344 F +44 (0)208 451 3366 [email protected] www.spirotech.co.uk